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Relevant bibliographies by topics / Wake-Induced Transition

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Academic literature on the topic 'Wake-Induced Transition'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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Journal articles on the topic "Wake-Induced Transition"

1

Mandal, A. C., and J. Dey. "An experimental study of boundary layer transition induced by a cylinder wake." Journal of Fluid Mechanics 684 (September 1, 2011): 60–84. http://dx.doi.org/10.1017/jfm.2011.270.

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AbstractBoundary layer transition induced by the wake of a circular cylinder in the free stream has been investigated using the particle image velocimetry technique. Some differences between simulation and experimental studies have been reported in the literature, and these have motivated the present study. The appearance of spanwise vortices in the early stage is further confirmed here. A spanwise vortex appears to evolve into a $ \mrm{\Lambda} $/hairpin vortex; the flow statistics also confirm such vortices. With increasing Reynolds number, based on the cylinder diameter, and with decreasing

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Kyriakides, N. K., E. G. Kastrinakis, S. G. Nychas, and A. Goulas. "Boundary Layer Transition Induced by a Von Karman Vortex Street Wake." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 210, no. 2 (1996): 167–79. http://dx.doi.org/10.1243/pime_proc_1996_210_358_02.

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A study has been made of the process of laminar to turbulent transition induced by a von Karman vortex street wake, in the boundary layer on a flat plate. The boundary layer developed under zero pressure gradient conditions while the vortex street was generated by a cylinder positioned in the free stream. Hot-wire measurements over a range of Strouhal frequencies and free stream velocities were used for the identification of the transition onset. From the analysis of the experimental data, two different transition mechanisms known in the literature as ‘strong’ wake and ‘weak’ wake induced tran

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Mayle, R. E., and K. Dullenkopf. "A Theory for Wake-Induced Transition." Journal of Turbomachinery 112, no. 2 (1990): 188–95. http://dx.doi.org/10.1115/1.2927632.

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A theory for transition from laminar to turbulent flow as the result of unsteady, periodic passing of turbulent wakes in the free stream is developed using Emmons’ transition model. Comparisons made to flat plate boundary layer measurements and airfoil heat transfer measurements confirm the theory.

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Kyriakides, N. K., E. G. Kastrinakis, S. G. Nychas, and A. Goulas. "A bypass wake induced laminar/turbulent transition." European Journal of Mechanics - B/Fluids 18, no. 6 (1999): 1049–65. http://dx.doi.org/10.1016/s0997-7546(99)00140-5.

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Funazaki, K. "Unsteady Boundary Layers on a Flat Plate Disturbed by Periodic Wakes: Part I—Measurement of Wake-Affected Heat Transfer and Wake-Induced Transition Model." Journal of Turbomachinery 118, no. 2 (1996): 327–36. http://dx.doi.org/10.1115/1.2836643.

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Measurements of wake-affected heat transfer distributions on a flat plate are made by use of a wake generator that consists of a rotating disk and several types of circular cylinder. The main purpose of this study is to construct a wake-induced transition model in terms of an intermittency factor, considering the evolution of the wake-induced turbulent region, a so-called turbulent patch in a distance–time diagram. A comparison between the proposed transition model and the measured heat transfer data reveals that the transition model yields good agreement with the measured data of all test con

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Funazaki, K. "Unsteady Boundary Layers on a Flat Plate Disturbed by Periodic Wakes: Part II—Measurements of Unsteady Boundary Layers and Discussion." Journal of Turbomachinery 118, no. 2 (1996): 337–44. http://dx.doi.org/10.1115/1.2836644.

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As the second part of the study, detailed hot-wire anemometry measurements of wake-affected boundary layers on the flat plate are made. These measurements are organized in order, first, to check the standpoint of the modeling of the wake-induced transition proposed in Part I, and second, to observe wake–boundary layer interaction in detail from a viewpoint of direct and indirect effect of the wake passage upon turbulent spot generation within the boundary layer, as described by Walker (1993). The validity of the presumed state of the wake-affected boundary layer in the distance–time domain, wh

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Wang, Haiyang, Zaijie Liu, Hexia Huang, Huijun Tan, and Dan Zhao. "Direct Numerical Simulation of Boundary Layer Transition Induced by Roughness Elements in Supersonic Flow." Aerospace 12, no. 3 (2025): 242. https://doi.org/10.3390/aerospace12030242.

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Current research on the transition mechanisms induced by moderate-height roughness elements remains insufficiently explored. Hence, direct numerical simulation (DNS) and BiGlobal stability analysis are employed in this study to investigate boundary layer transition from laminar to turbulent flow induced by moderate-height isolated roughness elements and roughness strips under a supersonic freestream at Mach 3.5. Analysis of DNS results reveals that the isolated roughness element induces transition within the boundary layer, characterized by two high-speed streaks in the wake. This transition i

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Wright, L., and M. T. Schobeiri. "The Effect of Periodic Unsteady Flow on Aerodynamics and Heat Transfer on a Curved Surface." Journal of Heat Transfer 121, no. 1 (1999): 22–33. http://dx.doi.org/10.1115/1.2825954.

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Aerodynamic and heat transfer investigations were performed on a constant curvature curved plate in a subsonic wind tunnel facility for various wake passing frequencies under zero pressure gradient conditions. Steady and unsteady boundary layer transition measurements were taken on the concave surface at different wake passing frequencies in which a rotating squirrel cage was used to generate the unsteady wake flow. The data were analyzed using time-averaged and ensemble averaged techniques to provide insight into the growth of the boundary layer and transition. Ensemble averaged turbulence in

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Schulte, V., and H. P. Hodson. "Unsteady Wake-Induced Boundary Layer Transition in High Lift LP Turbines." Journal of Turbomachinery 120, no. 1 (1998): 28–35. http://dx.doi.org/10.1115/1.2841384.

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The development of the unsteady suction side boundary layer of a highly loaded LP turbine blade has been investigated in a rectilinear cascade experiment. Upstream rotor wakes were simulated with a moving-bar wake generator. A variety of cases with different wake-passing frequencies, different wake strength, and different Reynolds numbers were tested. Boundary layer surveys have been obtained with a single hotwire probe. Wall shear stress has been investigated with surface-mounted hot-film gages. Losses have been measured. The suction surface boundary layer development of a modern highly loade

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Schobeiri, M. T., L. Wright, and P. Chakka. "Periodic Unsteady Flow Aerodynamics and Heat Transfer: Studies on a Curved Surface, Combined Part I and II." International Journal of Rotating Machinery 6, no. 6 (2000): 393–416. http://dx.doi.org/10.1155/s1023621x00000373.

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Aerodynamic and heat transfer investigations were done on a constant curvature curved plate in a subsonic wind tunnel facility for various wake passing frequencies and zero pressure gradient conditions. Steady and unsteady boundary layer transition measurements were taken on the concave surface of the curved plate at different wake passing frequencies where a rotating squirrel-cage generated the unsteady wake flow. The data were analyzed using timeaveraged and ensemble-averaged techniques to provide insight into the growth of the boundary layer and transition. Ensemble-averaged turbulence inte

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Dissertations / Theses on the topic "Wake-Induced Transition"

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Coull, John David. "Wake induced transition in low pressure turbines." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608541.

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Kittichaikarn, Chawalit. "A study of turbulent spots and wake-induced transition using liquid crystals." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301900.

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Thomas, Richard. "Closure of a laminar separation bubble by natural and wake-induced transition." Thesis, University of Leicester, 2004. http://hdl.handle.net/2381/30220.

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The concentrated use of one-dimensional hot-wire anemometry has shown leading edge boundary layer disturbances induced under each passing wake, which grow steadily via by-pass and natural transition methods into turbulent strips that convect with the flow. These disturbances are of such strength that the separated region is resisted and effectively swept away by the passing turbulence, momentarily giving rise to a wholly attached laminar boundary layer across the entire flat plate surface.;Propagation rates have shown leading edge speeds in excess of freestream values, a combination of boundar

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Mandal, Alakesh Chandra. "A Study On Boundary Layer Transition Induced By Large Freestream Disturbances." Thesis, 2010. https://etd.iisc.ac.in/handle/2005/2044.

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The initial slow viscous growth of the Tollmein-Schlichting wave in a canonical boundary layer transition is absent in bypass and wake-induced transitions. Although there have been a great deal of studies pertaining to bypass transition in boundary layers, the underlying breakdown mechanism is not clearly understood and it continues to be a subject of interest. Similarly, a wake-induced transition caused by Karman wake in the freestream remains poorly understood. The breakdown in this case is caused by anisotropic disturbances containing large scale unsteadiness in the freestream. Differing vi

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Mandal, Alakesh Chandra. "A Study On Boundary Layer Transition Induced By Large Freestream Disturbances." Thesis, 2010. http://etd.iisc.ernet.in/handle/2005/2044.

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The initial slow viscous growth of the Tollmein-Schlichting wave in a canonical boundary layer transition is absent in bypass and wake-induced transitions. Although there have been a great deal of studies pertaining to bypass transition in boundary layers, the underlying breakdown mechanism is not clearly understood and it continues to be a subject of interest. Similarly, a wake-induced transition caused by Karman wake in the freestream remains poorly understood. The breakdown in this case is caused by anisotropic disturbances containing large scale unsteadiness in the freestream. Differing vi

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MARCONCINI, MICHELE. "Applicazioni del calcolo non stazionario alle turbomacchine." Doctoral thesis, 2000. http://hdl.handle.net/2158/593135.

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Book chapters on the topic "Wake-Induced Transition"

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Kyriakides, N. K., K. Fotea, E. G. Kastrinakis, A. Goulas, and S. G. Nychas. "Boundary Layer Transition Induced by a Von Karman Vortex Street Wake." In Fluid Mechanics and Its Applications. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0457-9_51.

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Kohan, Khashayar F., Oliver R. H. Buxton, and Susan J. Gaskin. "On Low-Scalar Patches in Turbulent Wakes with and Without Free-Stream Turbulence." In IUTAM Bookseries. Springer Nature Switzerland, 2024. https://doi.org/10.1007/978-3-031-78151-3_15.

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AbstractHigh-resolution, time-resolved, simultaneous particle image velocimetry and planar laser-induced fluorescence are performed to study the characteristics of the low-scalar ‘holes’ in a planar wake exposed to various cases of background turbulence as parameterized by the turbulence intensity and length scale. Several metrics are employed to distinguish the engulfed holes from those generated internally. It is found that beyond a transition distance of 18 Kolmogorov microscales from the wake boundary, holes exhibit comparable behaviour to the wake core, suggesting their generation by loca

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Anderson, Thomas H. "Plate convergence, consumption, collision, coupling, capture, and formation of mantle waves—Linkages to global orogenesis and epeirogeny." In In the Footsteps of Warren B. Hamilton: New Ideas in Earth Science. Geological Society of America, 2022. http://dx.doi.org/10.1130/2021.2553(13).

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ABSTRACT Widespread episodes of major contractional orogenesis correlate commonly with ages of high-pressure eclogitic rocks formed during bottom-driven, induced subduction of crustal terranes. Rapid exhumation of the deeply emplaced crust has led to the development of the concept of a “tectonic dunk.” The dunk process is a hallmark component of a suite of linked tectonic, magmatic, metamorphic, and sedimentologic processes that systematically follow plate interactions, including collision, coupling, and capture resulting in plate reconfiguration and changes of movement. Plate capture, which t

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Conference papers on the topic "Wake-Induced Transition"

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Mayle, R. E., and K. Dullenkopf. "A Theory for Wake-Induced Transition." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-57.

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A theory for transition from laminar to turbulent flow as the result of unsteady, periodic passing of turbulent wakes in the free stream is developed using Emmons’ transition model. Comparisons made to flat plate boundary layer measurements and airfoil heat transfer measurements confirm the theory.

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Elsner, Witold, Stephane Vilmin, Stanislaw Drobniak, and Wladyslaw Piotrowski. "Experimental Analysis and Prediction of Wake-Induced Transition in Turbomachinery." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53757.

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The paper presents an experimental and numerical analysis of the interaction between wakes and boundary layers on aerodynamic blade profiles. The experiment revealed that incoming wakes interact with boundary layers and cause the significant increase of velocity fluctuations in the boundary layer and in consequence shift the transition zone towards the leading edge. The full time evolution of periodic wake induced transition was reproduced from measurements. The numerical simulation of the flow around the blade profile has been performed with the use of the adaptive grid viscous flow unNEWT PU

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Funazaki, Ken-ichi, and Takahiro Otsuki. "Studies of Wake-Induced Bypass Transition of a Flat-Plate Boundary Layer: Comparisons Between Two Transition Modes Induced by Small Sphere Wake and Thin Wire Wake." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68355.

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This study aims at deepening the understanding of wake-induced bypass transition process of a flat-plate boundary layer using two types of wake generating objects, which are small spheres and thin wires. Main focus is on emergence of isolated turbulent spots from the influence of the wake passage over the boundary layer. Precursors of the wake-induced turbulent spot, which have not been observed in an explicit manner in any other previous studies, are also of concern in this study. It is expected that wakes from the wires are so weak that an isolated turbulent spot may be induced by the wire w

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Mayle, R. E., and K. Dullenkopf. "More on the Turbulent-Strip Theory for Wake-Induced Transition." In ASME 1990 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/90-gt-137.

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A theory for transition from laminar to turbulent flow with an unsteady, periodic passing of turbulent wakes in the free stream has recently been presented by the authors. The theory considers a time-averaged transitional flow caused by the formation and propagation of turbulent strips along the surface. To apply the theory, however, both the origin and a quantity related to the production rate of these turbulent strips must be known. In this paper, after a brief review of the theory, a dimensional analysis of the problem is presented and data from experiments re-examined in light of the resul

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Solomon, W. J., and G. J. Walker. "Observations of Wake-Induced Transition on an Axial Compressor Blade." In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-381.

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A closely-spaced array of hot-film gages fully covering both suction and pressure surfaces on the outlet stator of a 1.5-stage axial compressor was used to obtain dynamic measurements of wall shear stress. Observations were made over a range of Reynolds numbers at an incidence close to the design value. Various methods of presnting the data, including time-space contour plots of ensemble-average intermittency from the film gages are analyzed: related problems of interpretation are discussed. Extensive regions of laminar flow were identified on the suction surface: at the highest Reynolds numbe

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Takeuchi, Keiji, Susumu Fujimoto, Eitaro Koyabu, and Tetsuhiro Tsukiji. "Experimental Studies on Wake-Induced Transition of Turbulent Boundary Layers." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86486.

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Wake-induced bypass transition of boundary layers on a flat plate subjected to favorable and adverse pressure gradients was investigated. Detailed boundary layer measurements were conducted using two hot-wire probes. A spoked-wheel-type wake generator was used to create periodic wakes in front of the flat plate. The main focus of this study was to reveal the effect of the Strouhal number, which changed by using different numbers of wake-generating bars, on the turbulence intensity distribution and the transition onset position of the boundary layer on the flat plate using two hot-wire probes.

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Walters, D. Keith, and James H. Leylek. "A CFD Study of Wake-Induced Transition on a Compressor-Like Flat Plate." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38680.

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Recent experimental work has documented the importance of wake passing on the behavior of transitional boundary layers on the suction surface of axial compressor blades. This paper documents computational fluid dynamics (CFD) simulations using a commercially-available general-purpose CFD solver, performed on a representative case with unsteady transitional behavior. The study implements a new, advanced version of a three-equation eddy-viscosity model previously developed and documented by the authors, which is capable of resolving boundary-layer transition. It is applied to the test cases of s

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Walker, G. J., W. J. Solomon, and J. P. Gostelow. "Observations of Wake-Induced Turbulent Spots on an Axial Compressor Blade." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-378.

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Measurements of transitional flow in regions of strong adverse pressure gradient on an axial compressor stator are reported. The range of observations covers separating laminar flow at transition onset, and reattachment of intermittently turbulent periodically separated shear layers. Transition was characterised by the regular appearance of turbulent spots in association with the rotor blade wake disturbances. However, the initial breakdown did not coincide with the wake passage as has usually been observed by other workers. The spots rather evolved from the growth of instability wave packets

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Beevers, Adam D., Joao Amaral-Teixeira, and Roger Wells. "Modelling Unsteady Transition Effects in an Axial Compressor." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-51257.

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Wake induced transition is simulated at mid-span on a C4 stator blade in a 1.5 stage low speed axial compressor using the CFX γ – θ transition model. IGV and rotor wake inputs were created from a succession of Fourier series produced from experimental data. The purpose of the study was to understand the effectiveness of the γ – θ model implemented in a commercial code to predict the unsteady effects of wake induced transition. The γ – θ transition model was found to predict wake-induced transition and the subsequent calmed region caused by the passing wakes. The wake velocity defect creates co

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Schulte, Volker, and Howard P. Hodson. "Unsteady Wake-Induced Boundary Layer Transition in High Lift LP Turbines." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-486.

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The development of the unsteady suction side boundary layer of a highly loaded LP turbine blade has been investigated in a rectilinear cascade experiment. Upstream rotor wakes were simulated with a moving-bar wake generator. A variety of cases with different wake-passing frequencies, different wake strength and different Reynolds-numbers were tested. Boundary layer surveys have been obtained with a single hot-wire probe. Wall shear stress has been investigated with surface-mounted hot-film gauges. Losses have been measured. The suction surface boundary layer development of a modern highly load

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Reports on the topic "Wake-Induced Transition"

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Baptista, Dulce, Juan Manuel Sandoval Ayala, Heewan Noh, and Rafael Novella. Labor Markets and Climate Change: How to Adapt Labor Market Policies and Improve Employment Opportunities? Inter-American Development Bank, 2024. http://dx.doi.org/10.18235/0012889.

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In the wake of a robust economic recovery from the COVID-19 pandemic in 2021 and 2022, Latin America and the Caribbean (LAC) now face a less promising growth outlook for 2024, with slowing employment growth and rising concerns over inflation. In this context, climate change is increasingly affecting labor markets. As global temperatures continue to rise due to human-induced greenhouse gas emissions, the negative effects on employment, labor conditions, and productivity pose significant threats to the region's workforce. However, amidst these challenges lies an opportunity for strategic interve

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